Combines elements of both tanked and shit-faced. A supreme level of inebriation. Includes a high likely hood of being arrested or the possibility of waking up in a ambulance/hospital. Though rarely occurring, getting tank-faced is often a life changing event.
Tom: "How did Dan's birthday celebration go?"
Bill: "He was out of control, after a bunch of shots he was so Tank-faced we lost track of him. I got a call this morning, telling me to come pick him up at the police station."